Injector.



' check in case of breakage or dismemberment UNTTED STATES PATENT OFFICE..

NATHANIEL B. DODGE, OF FITCHBURG, MASSACHUSETTS.

mai-:Crea` SPECIFICATION forming part of Letters Patent N0. 660,182, dated October 23, 1900.

. Application filed April 27, 1900. Serial No. 14:568. y(Model.)

To @ZZ whom t may concern:

:3e it known that I, NATHANIEL iB. DODGE, a citizen of the United States, and a resident of Fitchburg, county of Worcester, State of Massachusetts, have invented an Improvement. in Injectors, of which the following description, in connection with the accompanying d rawings, is a specification, like letters on the drawings representing like parts.

This in veution relates to injectors, more particularly adapted for supplying locomotiveboilers with feed-water, of the general type shown in United States Patent No. 530,476; and one of the objects of my present invention is to provide an injector embodying in its construction various features tending to simplification and reduction of parts and increased efficiency and ease of operation.

Another object is the production of means for preventing disarrangement of the boilerof the injector check-valve.

I have so changed and improved the construction that the Working parts of the injector can be conveniently detached or assembled without interfering with the boiler connection, and by the compact and convenient construction and arrangement of parts I have rendered the operation and handling much more convenient than has been possible heretofore.

Figure l is a longitudinal sectional View of an injector embodying one form'of my invention. Fig. 2 isa top or plan view of a portion of the manually operable controlling means for the `overow check-valve. Fig. 3 is a transverse sectional detail, on the line 0c, Fig. l, looking toward the left, of the watersupply valve and its chamber or seat. Fig. 4 is an enlarged end elevation of the tailpiece guard, to be described; and Fig. 5 is alongitudinal section thereof on the line y y, Fig. 4.

The general arrangement and mode of operation of my injector are substantially such as are well known and understood; but I have herein made the casing d as a single casting, having usual steam and water inlets ct a2, respectively, and an annular chamber ax, communicating with the interior of the casing by a port fx, controlled by a suitable overfiow check-valve f, the surplus or overoW Water passing out -of the chamber dX through the outletport f. I have herein shown a hollow boss 0010 at the top .of the chamber, threaded to support a chamber 01,41, having its closed end apertu red for the sn ug passage therethrough of the stemfgof aplunger or piston f3, which is adapted to slide in the chamber, a strong spring s being interposed between the plunger and the endot' the chamber. When free to act, the spring forces the plunger down against the stem of the overflow check-valvefand maintains it seated, closing the port fx, as when it is desired to use the injector as a heater. The outer end of the stem is provided with preferably oppositely-extended lugs f4, adapted, when the plunger is retracted, as shown in Fig. l, to rest in preferably-notched ears n.42 on the end of the chamber @41, (see Figs. l and 2,) the lugs and ears operating as a detent to maiutain the plunger in inoperative position, so that the check-valve f will operate automatically. i

When the engineer Wishes to use the injector as a heater, he grasps the lugs f4 as a handle, lifts them out of the notched ears w12, and gives the stem a quarter-turn, releasing the stem,whereupon the spring s forces the plunger f3 down upon the guide-stem of the valve f and maintaining it seated. Reverse operation returns the plunger and stem to the position shown, freeing the check-valve for automatic operation when the injector is in use as such.

I have herein shown the casing as provided with internal, integral, and annular seats a3 a4, the former being smooth or non-threaded, While the latter is screw-threaded, (see Fig. 1,) said seats being in axial alinement, and the bore of the seat a3 is shown as smaller than that of the seat a4. The combining-cone b is eXteriorly reduced, as at Z230, to tightly tit y IOO cone of largest diameter-can pass freely through the seat d4.

By making the cones with a detachable connection they can be inserted in or removed from the casing as one, greatly facilitating assembling or withdrawal when it is necessary to clean the interior of the injector.

By making a tight sliding fit for the combining-cone in the seat d3 l can more readily assemble the parts, and if using alkali water it is a comparatively easy matter to WithdrawT the cone when necessary, as the alkaline deposit will not fill up the joint, as in the case of' a threaded seat. The cones are introduced from the open steam end of the casing, the steam-cone c having a threaded portion to engage the threaded seat a4, and an annular shoulder 032 serves t0 seat the end of the base bx of the combining-cone, so that when the shoulder b thereof engages the seat a3 both cones will be in proper operative position. The cone c has the usual seat c2 for the starting-valve d, of substantially usual construction, the tubular extension (ZX of the valve and which extends part way into the steamcone being shown as integral with the valve.

The open steam end of the casing a, is shown as having an outwardly-beveled annular edge d50, which receives a correspondingly-beveled `liange or lip a5 on the. inner end of the sleeve or gland ai, which is rigidly, though detachably, secured to the casing in usual manner, the seat d50 and liange d5 being preferably ground lo a steam-tight joint, closure being completed by the shoulder a6.

Referring to Fig. l, it will be seen that the outer end of the steam-cone is separated from the inner end of the flange d5, leaving a passage for the steam back of' the valve d, to retain the latierseatedaid cone having notches S, by which it can be screwed into place by means of a suitable wrench.

The starting valve-stem cl' extends` through the sleeve or gland as, by Which it is centered and guided, and passes through ears on a block h2, pivoted at h3 on a handle h, slotted longitudinally at 7L to receive the block and fulcrumed on the radius-bar hX, the latter being in turn pivotally mounted on the sleeve a8. A nut d2 on the threaded end of the Valvestem between the ears of the block 7b2 operatively and adj ustably connects the said valvestem and block. This ivery direct and simple actuating device for the injector economizes space, is convenient of access, and strong and durable, a single movement of the operators hand in or out effecting the desired result.

The delivery check-valve M is of usual construction and mounted in the delivery end of the casing; but its supporting-shell on I have made long and internally flaring toward the steam end of the injector, so that the mouth of said shell is substantially opposite the overflow check-valve f, While the nozzle h2o of the combining-cone is elongated to approach Within a short distance of the mouth of the shell,

the mouth being of considerably larger area than the nozzle of said cone. By this construction I greatly improve the operation of boiler-check, operates as a guard to preventthe injector-check or any part of the latter from passing through the feed-pipe fo the boiler and preven l ing the proper operation of the boiler-check.

Serious damage and delay have frequently been caused by the injector-check-or some part thereof working through the feed-pipe and preventing the closing of the boiler-check, with the result that the boiler is inevitably emptied of its contents. By the interposition of a guard, as herein shown, it is impossible for any loose part to pass from the injector into the feed-pipe, and thereby any derangement of the operation of the boiler-check is absolutely prevented.

The casing is herein shown as provided with a deflector am, extended forward from the seat a and into the lower part of the chamber A, in which the base of the combining-cone is located, the deliector exten ding above and beyond the Water-inlet to deflect the Water toward the forward end of the chamber A, so that the Water is prevented from passing directly into the combiningcone. The said chamber is of course highly heated, and the circulation given to the entering water tends to raise its temperature before it can enter the combining-cone.

At the lower rar end of the heating-chamber Athe casing is shaped to form an elongated cylindrical chamber or seat C015, Figs. l and 3, its inner end opening into the heatingchamber and its outer end adapted to be closed by a gland or sleeve @36, the Water-inlet port a2 intersecting the Wall of said chamber 01.15. Within this chamber I have shown a rotatable cylindrical valve al, elongated and made tubular, closed at its rear end all, and having a lateral opening als in its side wall, the stem al being extended through the gland n.86, a handle n.20, secured to the outer end of' the stem, being shown in Fig. l as provided with a iinger am to enter a longitudinally-grooved transverse are n.22, secured to the radius-bar hX. The lateral opening als is adapted to be brought into register with the inlet d2, whereupon the water will pass through the valve and out of its open inner end into the chamber A, and by turning the valve the inlet a2 can be partly or Wholly covered by the solid Wall of the valve. By the construction herein shown the valve has a large bearing-surface which thoroughly supports and centers the valve, and by making the outer end of the valve closed a very tight closure is secured,

preventing` anyentrance of air from the back to interfere with the vacuum'. The position of the finger 0,21 relative to the arc w22 shows instantly to the engineer the position of the water-Supply valve, and the operating-handle d20 is within easy reach. f

By making the outlet of the combining-cone adjacent the liaring shell of the delivery check-valve any wearof the outlet will not tend to throw the water-flow to one side, the flaring walls of the shell directing the wateriow always toward the center of the checkvalve. Such arrangement also greatly facilitates the construction and accurate positioning of the parts in assembling.

By making the leap or space between the mouth of the shell and the outlet of the combining-cone substantially opposite the overflow check-valve the waste water and steam will more readily be freed, as a very direct passage therefor to the waste or overflow outlet is provided.

My invention is not restricted to the precise construction and arrangement of parts herein shown and described, as the saine may be modiiied or varied by those skilled in the art without departing from the spirit and scope of myinventioml having herein shown one practempting `to illustrate various other forms in Y which the same could be readily embodied.

Having fully described my invention, what l claim, and desire to secure by Letters Patent, is-

l. In an injector, a casing having an opening at the steam end and provided with a threaded seat for and to xedly position the steam-cone and a non-threaded seat for the com bining-cone,the cones being adapt-ed to be inserted through the said opening ofthe casing, means to detachably connect the cones, and a detachable closure forthe steam end of the casing.

2. In an injector, a one-piece casing having integral seats Jfor the steam and combining cones, one of said seats being threaded to iixedly position the engaged cone, said casing having an opening at the steam end, detachably-connected steam and combining cones adapted to he inserted or removed together through said opening in the casing, and a detachable closure for the steam end of the casing.

3. In an injector, a one-piece casing having a threaded and a non-threaded seat,integral therewith, said casing having an opening at the steam end, the steam and combining cones, the former havingathrcaded portion to engage and be rigidly held by its seat and the latter having a Shoulder to butt against the end of the non-threaded seat, means to maintain the combining-cone in position by the steam-cone, said cones being adapted to be inserted and removed through said opening in the casing, and a closure for said opening.

4. In an injector, the casing having an internal heating-chamber, the combining-cone the base of which extends into said chamber, the water-valve, and a deflector to direct the Water admitted by the valve to the forward part of the chamber before it enters the cone.

5. In an injector, the casing having an internal, threaded seat and an annular beveled opening at one end, a steam-cone screwed into said seat and having a rigidly-attached combining-cone, and a removable gland provided with a beveled flange toy enter and tightly close said beveled opening of the casing.

6. In an injector, the casing having a water-inlet, the rotatable water-valve having an end outlet, and an elongated cylindrical seat therefor.

7. In an injector, the casing having a Water-inlet, an elongated, cylindrical valve-seat, and a tubular water-valve closed at its rear end and open at its opposite end, and having a side opening adapted to register with the inlet.

8. In an injector, the casing havingan internal heating-chamber, and a water-inlet, an elongated, cylindrical valve-seat at the rear end and open at its opposite end, of the chamber, and a tubular Water-valve movable in said seat and closed at its rear end and having a side opening adapted to register with the inlet.

9. In an injector, the casing having a water-inlet, a rotatable, tubular Watervalve closed at its rear end and having a side opening adapted to register with the inlet, the valve-stem, and a gland or sleeve through y which it passes.

opening, and an elongated, cylindrical seat forming a continuous support for the valve.

12. In an injector, the casing having a cylindrical chamber open at one end to receive the valve and provided with a water-inlet, a tubular water-valve closed at its outer end and having a lateral inlet, rotatably mounted in said chamber and supported thereby throughout its length, and a gland to close the open end of the chamber.

13. In an injector, the casing having an intern al heating-chamber and a communicating cylindrical chamber or valve-seat open at its outer end and provided witha Water-inlet,a tubular Water-valve closed at its outer end and having a lateral opening adapted to register with said inlet, a gland to close the open end of the said valve-seat, and means to move the valve to regulate the entrance of water to the heating-chamber.

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14. In an injector, a casing made as a single cast-i ng having integral seats for the steam and combining cones, a cylindrical chamber or valve-seat forming an integral part of the casing and opening thereinto, and a tubular Water-valve located within said chamber or seat, the valve being centered and supported thereby throughout its entire length.

l5. In a boiler-feeding injector, the checkvalve, and a guard interposed between the said valve and the boiler connection.

16. In a boiler-feeding injector, the casing, a check-valve at its delivery end, and a tailpiece connected with the casing beyond said valve and provided with a guard.

17. A tubular tailpiece for boiler-feeding injectors, having an internal guard, for the purpose set forth.

IS. The combination, with the casing having the water-inlet, of a water-supply valve having a lateral inlet and longitudinal delivery-passage therein, opening at its forward end, and means to actnate the valve to regulate the passage of Water therethrough from the Water-inlet.

19. In an injector, an overflow-valve, a spring-actuated seating device to maintain said valve seated when using the injector as a heater, and a detent to normally retain said device inoperative.

20. In an injector, an oVerlioW-valve, an inclosing chamber,a spring-actuated plunger therein to engage said valve and maintain it seated, and means to normally maintain the plunger out of engagement with the valve.

2l. In an injector, an overflow-valve, an inclosing chamber, a sliding plunger therein, and its attached stem extended through the chamber, aspring to force the plunger against the valve and maintain it seated,'an external means cooperating with the stem to normally maintain the plunger retracted against the stress of the spring and out ot' engagement with the valve.

22. In an injector, an overflow-valve, an inclosing chamber, a spring-actuated device mounted therein, to engage and maintain the valve seated, said device including.,T a stem projecting through the chamber and having a lateral lug, and a notched ear on the exterior of the chamber, to normally engage the lug and maintain the said spring-actuated device inoperative.

23. In an injector, an overflow-valve, an inclosing chamber, a sliding, spring-actuated plunger therein adapted to engage and maintain the valve seated when using the injector for heating, a projecting stem secured to the plunger and provided with external lateral lugs, and oppositely-looated ears on the end of the chamber, notched to normally receive the lugs and hold the stem retracted, disengagement of said lugs and ears by partial rotation of the stern releasing the plunger.

24:. In an injector, the combining-cone, the delivery check-valve, an elongated, flaring supporting-shell therefor havingits mouth of greater area than the outlet of said cone and adjacent thereto, and the overliow checkvalve located su bstantially opposite the rear end of said shell.

25. In a boiler-feeding injector, the checkvalve, and means located beyond the latter to prevent the passage of any broken or detached part of the injector to the boiler connection.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

NATHANIEL B. DODGE.

Witnesses:

JOHN C. EDWARDS, AUGUSTA E. DEAN. 

